Synonyms: buzzer
Definition: a signaling device that makes a buzzing sound
Similar words: signaling device
Definition: a device used to send signals
Synonyms: doorbell, buzzer, bell
Definition: a push button at an outer door that gives a ringing or buzzing signal when pushed
Similar words: push, push button, button
Definition: an electrical switch operated by pressing
Usage: the elevator was operated by push buttons; the push beside the bed operated a buzzer at the desk